<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin:0;
            padding:0;
        }
        body{

            background-color: #ff8500;
        }
        .loading{
            width:60px;
            height:15px;
            margin:200px auto;
        }
        .loading div{
            float:left;
            margin-right:5px;
            width:15px;
            height:15px;
            border-radius: 50%;

            background-color: white;

            animation:scale 0.8s ease infinite;
        }

        .loading div:nth-child(1){
            animation-delay: 0.1s;
        }
        .loading div:nth-child(2){
            animation-delay: 0.2s;
        }
        .loading div:nth-child(3){
            animation-delay: 0.3s;
        }

        @keyframes scale{
            30%{
                transform:scale(0.3);
            }
            100%{
                transform:scale(1);
            }
        }

    </style>
</head>
<body>
<div class="loading">
    <div></div>
    <div></div>
    <div></div>
</div>
</body>
</html>